Improvement in draught-regulators for hot-air furnaces



S. J. GOLD. Draft Regulator for Hot-Air Furnaces.

N0. 128,035. l Patentdlune18,l872.

1 ffii- 1111 PATENT OFFICE` sTEPHEN J. COLD, OE COENWALL, CONNECTICUT.

IMPROVEMENT IN DRAUGHT-REGULATORS FOR HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 128,035, dated June 18,1872.

Specification describing a new and Improved Draught-Regulator forHot-Air Furnaces, invented by STEPHEN J. GOLD, of Cornwall, in thecounty of Litchfield and State of Connecticut.

Figure l is a sectional side elevation of my invention; and Fig. 2 is afront elevation of the same.

Similar letters of reference indicate corresponding parts.

This invention relates to a new apparatus applied to hot-air furnacesfor the purpose of reducing the draught if the heat produced shouldreach or exceed a certain degree. The invention consists principally inthe use of a boiler 7 placed within the hot-air chamber that surroundsthe furnace, and in the connection of said boiler, by means of pipes,with a vessel containing a diaphragm or piston in such a manner that,when, by an excess of heat, steam is created in the boiler, the dia--phragm or piston will be moved, and will, by its motion, draw the doorsof the furnace into the necessary position for reducing the draught andheat.

A in the drawing represents the furnace, of suitable size and kind,inclosed in a hotair chamber, B, which, by a pipe or pipes, C,communicates with all apartments to be warmed. a and b are the doorsleading to the furnace -one to the fire-place, the other to the lowerair-supply chamber. These doors are, by chains c and d, respectively,connected with the ends of a-lever, l), which is, at e, pivoted to astem projecting from a vessel, E. Within the latter is a diaphragm orpiston, (f, from which a rod extends to connect with thelever D, asshown. By means of` a pipe, F, the vessel E communicates with a flatboiler, G, which is, bythe pipe F, suspended within the air-chamberB.The boiler is proportionately small, and is to be charged with water.

When the heat in the chamber B becomes so high as to create steam in theboiler the steam will act against the diaphragm or pis ton and move itso as to swing the lever D, which will then open the door a and shut thedoor b, thereby reducing the draught.

The pipe F is jointed in order that it may accommodate itself to the upand-down-movements of the boiler. The boiler is swung or turned in orderEto expose it to the various stratums of heat, and thus regulate theaction upon doors a b. The more heat required the lower should theboiler be set, and vice versa.

If the boiler can receive heat only from the air that warms the house,then the regulator will neither act too quickly nor allow steam to beraised to a high pressure, as the regulator will keep uniform thetemperature of the hot air that makes the steam. This enables me to usea boiler with one qua-rt of water for the purpose of making steam tooperate the regulator. There is no outlet for the escape of steam, andnone is needed, since steam is raised only by the hot air in thechamber. There is also no waste of water, since, when steam is raised,the temperature of the air that made it is lessened and the steam isagain condensed into water, which returns to the boiler.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. The ilexible pipe F, arranged as and for the purposeset forth,

2. The combination, with said flexible pipe, of a boiler, G, surroundedentirely by the hot air of chamber B, as and for the purpose described.

' S. J. GOLD.

- Witnesses:

A. V. BRIEsEN, T. B. MOSHER.

